Colgate Total Gum Health Mouthwash is on sale for $2.99 this week at Walgreens. This sale double-dips with a Register Reward promotion. Buy one mouthwash and receive a $2.00 Register Reward. A Register Reward is a coupon that can be used like in-store credit on a future shopping trip. Buy one mouthwash, use one $0.75/1 printable coupon at checkout, and receive the $2.00 Register Reward. The final price will be $0.24!